I am 195 / 38" waist. The XL is trimmer than my previous xl EMS shell, but still leaves enough room for some thermal layer if needed. I tried on a Large and it was way too tight, so xl was easy choice for me.
Since I always hike in long sleeves due to New England having lots of ticks / mosquitos, the plastic feeling is a non- issue for me.
Finally a 3 layer event jacket would be optimal for some, but I liked the light weight ( mine is 11.5 oz) the pit zips and the other features ( good hood adjustment, hem cinch, long tail, etc.) that the price / value equation was as good as I could find. I also have always been very happy with EMS products - they seem to understand how to put out a reasonably priced product that check most if not all the boxes for me.